4.7.1. Biodegradation Test

The composting experiment described by Riaz et al. [32] was used to measure the biodegradation capability of the films produced. The topsoil was obtained from Kafrelshiekh University's experimental field (Kafr El-Shiekh, Egypt). The topsoil was put in a plastic container, and samples of each sheet (2 × 2 cm) were buried at a depth of 2 cm for three weeks. Twice a day, water was sprayed on the soil. The film samples were removed at the end of each week, and the weight loss of each film was recorded.
